Article contains 2 pages. I just posted the first section. Click the ABC link if interested to keep reading, they talk about manipulation Myostatin to build muscle. http://abcnews.go.com/Health/MedicineCuttingEdge/story?id=7231487&page=1 Oh and completely unrelated to anything: www.mapmyrun.com I just don't want to make another post and its probably on here somewhere already. But your runners should check that site out.